Liquid Penetrant Inspection (DYE)
Liquid Penetrant Inspection method works by the application of a dye to the surface of a part. The dye will use a capillary action to penetrate into surface discontinuities. After the application and removal/cleaning of the dye from the surface a developer will be applied. The developer will draw penetrated dye to the surface leaving a contrasting indication. Liquid Penetrant Inspection is used solely for the purpose of detecting surface discontinuities.